Clinton said that she had not fainted at the 9/11 memorial and that she was feeling good now.

Clinton told her supporters through Facebook that she was feeling fine and that she was getting better.Reuters

Democratic presidential candidate Hillary Clinton on Monday said that she is feeling better and that she should have listened to her doctor's advice to rest, but she thought she could power through her illness.

Clinton abruptly left a 9/11 memorial ceremony on Sunday and was seen stumbling, while she was waiting for her motorcade to arrive. There were reports that she had fallen ill and it was later confirmed that she had pneumonia.

However, Clinton said that she did not lose consciousness while waiting for her motorcade, she just felt dizzy and needed to cool off. "No, I didn't. I felt dizzy and I did lose my balance for a minute. But I got in, once I could sit down, once I could cool off, once I got some water, I immediately started feeling better," Clinton said.

Clinton's illness became a huge news and people started speculating whether she would continue with her presidential election campaign. On this, Clinton said, "I just didn't think it was going to be that big a deal." While talking to CNN's "Anderson Cooper 360", the Democratic presidential candidate said that she was diagnosed with pneumonia on Friday but despite the doctor's direction to rest at least for five days, she thought she could "just keep going forward and power through it and that didn't work out so well."

Clinton, later on Tuesday, told her supporters through Facebook that she was feeling fine and that she was getting better. She wrote, "I'm feeling fine and getting better," adding, "Like anyone who's ever been home sick from work, I'm just anxious to get back out there."

A video was released on Twitter where one moment she was seen staggering while waiting for her motorcade and the other moment she was seen slumping forward. People around her then helped her into the car.

Former U.S. president and Clinton's husband, Bill Clinton, in an interview on Monday with PBS' Charlie Rose said that Hillary was doing fine. He added that the same thing has happened to her on multiple occasions over the years when she got severely dehydrated.